|  | 5.3 | IP Routing Protocols
| 5.3.5 | Classifications of routing protocols
As you have learned, most routing protocols can be classified into three basic approaches: The distance-vector routing approach determines the direction (vector) and distance to any link in the network. Examples of distance-vector routing protocols are IGRP and RIP. The link-state (also called shortest path first) approach re-creates the exact topology of the entire network (or at least the partition in which the router is situated). Examples of link-state routing protocols are OSPF, IS-IS, and NetWare Link Services Protocol (NLSP). The hybrid approach combines aspects of the link-state and distance-vector approaches. An example of a hybrid routing approach is EIGRP.